package com.itheima.test.testnight;

public class neibu04 {
    public static void main(String[] args) {
        C c=new C();
        c.show();
    }
}
class  D{
    public void show(){
        System.out.println("fu...fu");
    }
}
class A extends D{


}
class B extends A{
}
class C extends B{

}